For the map you should take the idea from metro 2033 and make it so you need to press a button and your person will bring up the map and it will show the terrain and objectives in color. which will make it more realistic and you can make it so infantry gets not the best maps with sucky detail, squad leaders would get ok maps wich will have ok detail, commanders would get good maps that would have realy good detail and so on or you could have it like fog of war were your map only shows what your team has seen